Differing cultural backgrounds certainly do not justify liturgical abuses, and “liturgical dancing” is certainly a grave liturgical abuse. But don’t pretend that any Eastern Orthodox has the multiculturalism of the Roman Catholic Church. From what data I can find on the numbers of adherents, The Orthodox Church of Japan is the second-largest body of Orthodox worshippers outside of Europe and Western Asia, behind the United States. And it has only 25,000. The Korean Orthodox church consists entirely on ten parishes.
Culture is culture, whether it consists of 10 or 1000 parishes. And so is the morality of the Church. There is only one morally correct approach to cultures that developed outside the Church: to bring them to abandon their un-Christian standards and accept Christian standards.
I realize this is not "popular" in our own relativistic culture of tolerance, but this cannot change with popular demand. Anything goes simply cannot be what the Church teaches. Such ecumenism of Pope John Paul II was the reason the Orthodox withdrew form the Ecumenical movement and abandoned (broke off) the Catholic-Orthodox dialogue until BXVI revived it in 2006, by abandoning ecumenical abominations of his predecessor.
This "anything goes" relativism of ecumenism is what brought about liturgical abuses and Eucharattes, praying together with pagans, syncretism and what not.
The truth preached by the Church cannot be relative or true today but not yesterday or tomorrow. Hawaiian natives used to have incestuous relationships, polygamy, and promiscuity as part of their rich pagan culture. Was the Church supposed to, for the sake of cultural "tolerance," allow them to continue by incorporating such culture into some sociocultural culturally-specific brand of Catholic "Christianity?"
Their culture was no different than their idols. In fact their idols were the product of their culture. By exercising across the board popular cultural inclusiveness, the net effect is incorporation of paganism into Christianity.
Finally, I am certain that before Vatican II, the Catholic Church did not permit naked native dancers to desecrate the House of God and that the Church was truly catholic in its true meaning by promoting and teaching and adhering to one morality for all its members.